Chain grate.



No. 824,831. PATENTED JUNE 26, 1906.

- J. 3. BARNES.

CHAIN GRATE.

ABPLIOATION FILED NOV. 16, 1903.

'PATENTED JUNE 26, 1906. J. P. BARNES.

- CHAIN GRATE. APPLICATION FILED NOV. 1a. 1903.

3 SHEETSSHEET 3.-

llllllllllllllllll UNITED STATES BATE-INT OFFI JOSEPH 1 BARNES, OF ROCKFORD, ILLINOIS, ASSIGNOR To JOHN BARNES COMPANY, OF ROCKFORD, ILLINOIS, A (JORPOR A EE TION OF ILLINOIS.

CHAIN GRATE.

I Specification of Letters Patent. Application filed November 16, 1903. Serial No. 181.454.

Patented June 26,

To all whom it may concern:

Be it known that I, JOSEPH P. BARNES, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois,.have invented certain new and useful Im rovements in Chain Grates, of which the ollowing is a specification.

The Object of this invention isto provide means for transferring the ashes from the fire-chamber without. admitting cold-air to the fire-chamber. V

In the accompanying drawings, Figure 1 is a side elevation. 2 is a lengthwise vertical section. Fig. 3 is an end elevation in which parts are shown in section.

The main frame of my improved chain grate com rises two side sectlons 1 and 2,

connected by two rows of cross bars or tubes 3and 4 and a water-front 5, which can be filled through the pipes 6. This frame is sup "ported upon four wheels 7 ,'one located at each corner, and the wheels run upon tracks 8 in order that the frame and its attachments maybe withdrawn from the fire-chamber for the purpose of'making repairs. Two shafts 9 and 1.0 are supported b' the side sections of the main frame, and these shafts support sprocket-wheels 11, over which pass the links of the chain grate 12. The upper section of the chain grate rests upon the upper row .of

cross-tubes 3, and the lower section of the grate rests upon the lower row of cross-tubes '4. The shaft 9 is located in boxes 13 slidable in ways 14 in the side frames, and the boxes can be moved in the ways by the nuts 15 on the screw-threaded rods 16 in order that sufficient slack may be given the chain to allow the removal of a link and the. chain again tightened for use.

tion on the shaft 19, and to the end of one of its arms is connected a shield 23, which covers some of the teeth of the ratchet-wheel .21.

[The other arm of the bell-crank lever is in of the side bars of the main frame. I

handle form and has a projectionextending 'from one face fitted to enter the notches of the rack-bar 24, pivoted at one end to one The shaft 9 supports-a; worm-wheel 17 outside of the main frame,-

. squared, end of the {shaft vanced by hand.

Upon the shaft 19 is pivoted a bar 25, its

free end having a dog 26 pivoted thereto, 5 5 which is capable of enga ing the teeth of the ratchet-wheel 21. To t e dog is pivotall connected a rod 27,- to the other end of whic 1s connected a coiled spring 28, and a rod 2.9

has one end connected to the coiled spring 28 6o and its other end connected to a crank connected to some motive power. The coiled spring is located within a yoke 31", and the rod 29 passes through the u per end of the yoke and the rod 27 throug the lower end. A collar 32 has a set-screwconnection with the rod 27 outside of the yoke, and the rod 29 has a collar33 set-screwed to it at the upper end of the yoke. This arrangement is I employed to impart an intermittent ing movement to the chain grate. As the crank revolves a reciprocating movement will be imparted to the rod 29, and on its downward movement the collar 33 will en'- galge the yoke, and the yoke will engage the O0 ar 32, thereby carryin the dog down. The upward movement of the rod 29 Will 1111 upon the coiled spring '28, and throng it upon the rod 27 and do 26. This upward movementof the dog Wi 1 cause it .toengage' the teeth of the ratchet-wheel 21 and ad'- vance it a number of teeth, which in turn will partially rotate the worm' 18, and it in turn will rotate the worm-wheel l7 which will ad vance the grate a given distance. As the u upward movement of the dog is the same each stroke, if the shield were not employed the ratchet-wheel would be given the" am'e movement each timeybut by means ofithe shield some of the teeth of the ratchet-wheel 9o can be-covered, and as the dog must clear the shield before it can engage the teeth of the :1

ratchet-wheel it will be seen that adiiferent rate of movement will be given the ratchet? wheel witheach adjustment of the shield,"

and, consequently the advancing I'Iiovement of the grate can be regulated at will. [he

object of the employment of the coiled springl'j is to prevent breakage of the parts should the" grate become clogged, This is accomplished Ioo by the upward movement of the crank ei'cert coiled spring, and at such time the yokie is useless. A crank can be laced. on the,

an the grate ad' advanc- 70 mg its-influence uponwthe dog. throughthe Anjincline 34 is located over the, feed end of the grate, forming one side of a hopper for ;.the reception of fuel.

i A short shaft 35 is supported in bearings and supports a Worm 36, which meshes with a \VOIIl'l-WllOGl 37, supported by a shaft 38, located transversely of the frame, This shaft 38 has a series of arms 39 secured to it intermediate its bearings, and to each arm is sus' pended a link 40, their lower ends pivotally connected to the Water-front 5. By means of a crank placed onthe squared end of the shaft 35 the shaft 38 can be oscillated, which will raise or lower the waterfront, thereby; regulating the supply of fuel to the grate.

A shaft 41 is supported of the grate, and a ound this shaft is located a tube or shell 43, having two heads 44 connected thereto, and from. the inner face of each head extends radial ribs 45.

Plates 46 connect the ribs on one head with the ribs of the other head forming four sections or compartments. The periphery of one of the heads is provided with two notches 47.

The masonry forming the wall of the firechamber conforms to the curvature of the in bearings 42, setl, 1n, masonry, fprmmg the side walls of the firechamber and located near the discharge end heads and, as shown at Figs. 1 and 2, covers the lower right-hand compartment. A curved plate 48 covers nearly the upper lefthand compartmcnt, which in connec ion with the masonry leaves the upper righthand compartment within the ire-chamber and the lower left-hand compartment within 3 the aslnpit. A latch 49 has a pivotal connec-' 'tion with the curved plate 48, and a projection 50fro1n the latch passes through an open ing in the plate and enters one of the notches 47 in the drum. A weight 51 holds the projection within the notch. In this instance .I have shown a projection 52 extending from only one section of the grate-bars, but any number of grate-bars may be provided with them.

A hell-crank lever- 53 has a pivotal sup mrt and one arm extendingwithin the path of the movement of the projection extending from the grate-bars. A rod 54' connects the other arm of the boll-crank lever 53 with one arm of a bell-crank lever 55, and the other arm of the last-mentioned bell-crank lever has a con nection with the pivoted latch 49 by the rod 56. As the projection 52, carried by the gratc-bars, moves the hell-crank lever 53 the latch 49 will be moved suilicientlyto withdraw the projectirm 50 from the notch 47 of the drum, thereby liberating it for a purpose to appear hereinafter. A red 57 has a connection with the bell-crank lever 55, bvmcans of which the projection can be withdrawn at any time by hand.

A s rocket-wheel 58 has a connection with one 0 the heads 44 of the drum, and a chain belt 59 connects this sprocket-wheel with anmg a connection with the sproeket-wheelfil by a chain belt 65.

A pulley 66 is loosely mounted on a sleeveextending from the sprocket-wheel 64, which in turn is loosely mounted on the shaft 62. The projecting end of this sleeve is externally screw-threaded, and a hand-wheel 67 has a screw-threaded connection with the sleeve.

By means of the hand-wheelin its connection with the sleeve and bearing against the hub of the pulley the pulley can be clamped frictionally in connection with the sleeve, and consequently with the sprocket-wheel '64. As the pulley 66 is constantly rotating-its frictional engagement with the shaft 62'tends to rotate the shaft 62, and through the chain belts and sprocket-wheels the tendency is to rotate the drum, which is held from rotation by the projection 50 entering the notch 47 of the drum. .When the projection is withdrawn from engagement with the drum, the

drum will be rotated a half-revolution or until the projection 50 enters another notch, when the pulley will again slip on the shaft. The object of intermittently rotating the drum is to transfer the ashes T0111 the fire chamber into the ash-pit and without admitting cold air from the ash-pit into the fire-chamber. As the coal is burned the ashes will fall off the end of the grate into the upper right-hand compartment of the drum and will remain there until the drum is released, when a'halfrevolution will discharge theashes intothe ash-pit. It will be noticed that inthe halfrevolution of the drum necessarygto"'dis charge the ashes the masonryfwall and the;

curved plate 48 leave an opening into ashpit of less than a quarter of the circumference of the drum. Consequently no direct draft can gain access from the ash-pit into the fire: chamber at any time around the discharge end of the grate. If it should happen that all the coal was Imtconsumed, l 'have made provision for the admission of air froimthe ash-pit through the ashes contained in the compartment of the drum. This I accomplish by making a series of holes 68 transversely through the shaft 41 andholes '69 through the shell 43 diagonallythat is, from the lower left-hand compartment to the upper right-hand compartment or from the ash-pit into the fire-chamber. By turn ing the shaft 41 by hand. its openings may be brought into register with 1 the openings through the shell, thereby admitting air into the fire-chamber. By turning the shaft the openings thereinanay be so turned as to prevent air passing through the openings.

I claim as my invention 1. The combination of a movable endless IIO ' 5' other 10 grate,

i 5 rotating the drum.

grate, a" rotatable drum formed with receptacles, walls inclosingthe drum on two opposite sides leavin a section of the drum communicating with the fire-chamber and ansect1on communicating with the ashpit, and adjustable passage ways through the drum forming a communication between the ash-pit and fire-chamber.

2. The'combination of a movable endless a rotatable drumformed with rece tacles and located at the discharge end of t e grate, a latch holding the drum at rest, connections between the latch and grate for releasing the latch, and frictional devices for 3. The combination of a movable endless grate, a rotatable drum formed with receptacles and located at the discharge end of the grate, a latch holding the drum at rest, connections between the latch and grate for releasing the latch, a hand-lever for releasing the latch and means for rotating the drum.

4, The combination of a movable endless grate, a movable surface receiving ashes from the grate, means for moving the surface, a latch for holding the surface at rest and connections between the latch and grate for releasing the latch.

' JOSEPH P. BARNES Witnesses:

AUBREY T. BARNES. AHO. BEHEL. 

